Wołoszyn J. ‘Live Weapon’ – Undercover Agents in Prison Cells: Secret Collaborators in Prisons and Investigative Jails in the Years 1944–1956. pis [Internet]. 2010 Dec. 30 [cited 2026 Nov. 13];16(2):295-337. Available from: https://czasopisma.ipn.gov.pl/index.php/pis/article/view/435